1
WB JEE 2022
+1
-0.25

When an AC source of emf E with frequency $$\omega$$ = 100 Hz is connected across a circuit, the phase difference between E and current I in the circuit is observed to be $${\pi \over 4}$$ as shown in the figure. If the circuit consist of only RC or RL in series, then

A
R = 1 k$$\Omega$$, C = 5 $$\mu$$F
B
R = 1 k$$\Omega$$, L = 10 H
C
R = 1 k$$\Omega$$, L = 1 H
D
R = 1 k$$\Omega$$, C = 10 $$\mu$$F
2
WB JEE 2021
+1
-0.25

The rms value of potential difference V shown in the figure is
A
$${{{V_0}} \over 2}$$
B
V0
C
$${{{V_0}} \over {\sqrt 3 }}$$
D
$${{{V_0}} \over {\sqrt 2 }}$$
3
WB JEE 2021
+1
-0.25

Consider a pure inductive AC circuit as shown in the figure. If the average power consumed is P, then
A
P > 0
B
P < 0
C
P = 0
D
P এর মান অসীম
4
WB JEE 2020
+1
-0.25

When a DC voltage is applied at the two ends of a circuit kept in a closed box, it is observed that the current gradually increases from zero to a certain value and then remains constant. What do you think that the circuit contains?
A
A resistor alone
B
A capacitor alone
C
A resistor and an inductor in series
D
A resistor and a capacitor in series
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